A political family (also referred to as political dynasty) is a family in which multiple members are involved in politics — particularly electoral politics. Members may be related by blood or marriage; often several generations or multiple siblings may be involved.
A royal family or dynasty in a monarchy is generally considered to not be a "political family," although the later descendants of a royal family have played political roles in a republic (such as the Arslan family of Lebanon). A family dictatorship is a form of hereditary dictatorship that operates much like an absolute monarchy, yet occurs in a nominally non-monarchic state.